Track ( track_id, name, album_id* (Album), media_type_id* (MediaType), genre_id* (Genre), composer, milliseconds, bytes )

Album ( album_id, title, artist_id* (Artist) )

Artist ( artist_id, name )

Genre ( genre_id, name )

!MediaType ( media_type_id, name )

Price ( price_id, value, date, track_id* (Track) )

!InvoiceLine ( invoice_line_id, invoice_id* (Invoice), track_id* (Track), quantity )

Invoice ( invoice_id, customer_id* (Customer), invoice_date, billing_address, billing_city, billing_state, billing_country, billing_postal_code, total )

Customer ( customer_id, first_name, last_name, company, support_rep_id* (Employee), personal_info_id* (AddressInfo), contact_id* (Contact) )

Employee ( employee_id, first_name, last_name, title, reports_to* (Employee), birth_date, hire_date, personal_info_id* (AddressInfo), contact_id* (Contact) )

!AddressInfo ( address_info_id, address, city, state, country, postal_code )

Contact ( contact_id, phone, fax, email )

Playlist ( playlist_id, name )

!PlaylistTrack ( playlist_track_id, playlist_id* (Playlist), track_id* (Track) )